<template>
  <el-container style="min-height: 100vh">
    <el-aside :width="sideWidth + 'px'"
              style="background-color: rgb(238, 241, 246); box-shadow: 2px 0 6px rgb(0 21 41 / 35%);">
      <el-menu :default-openeds="['1', '3']" style="min-height: 100%; overflow-x: hidden"
               background-color="rgb(48, 65, 86)"
               text-color="#fff"
               active-text-color="#ffd04b"
               :collapse-transition="false"
               :collapse="isCollapse"
      >
        <div style="height: 60px; line-height: 60px; text-align: center">
          <img src="../assets/logo.png" alt="" style="width: 20px; position: relative; top: 5px; margin-right: 5px">
          <b style="color: white" v-show="!isCollapse">后台管理系统</b>
        </div>
        <el-submenu index="1">
          <template slot="title">
            <i class="el-icon-message"></i>
            <span slot="title">导航一</span>
          </template>
          <el-menu-item-group>
            <template slot="title">分组一</template>
            <el-menu-item index="1-1">选项1</el-menu-item>
            <el-menu-item index="1-2">选项2</el-menu-item>
          </el-menu-item-group>
          <el-menu-item-group title="分组2">
            <el-menu-item index="1-3">选项3</el-menu-item>
          </el-menu-item-group>
          <el-submenu index="1-4">
            <template slot="title">选项4</template>
            <el-menu-item index="1-4-1">选项4-1</el-menu-item>
          </el-submenu>
        </el-submenu>
        <el-submenu index="2">
          <template slot="title">
            <i class="el-icon-menu"></i>
            <span slot="title">导航二</span>
          </template>
          <el-menu-item-group>
            <template slot="title">分组一</template>
            <el-menu-item index="2-1">选项1</el-menu-item>
            <el-menu-item index="2-2">选项2</el-menu-item>
          </el-menu-item-group>
          <el-menu-item-group title="分组2">
            <el-menu-item index="2-3">选项3</el-menu-item>
          </el-menu-item-group>
          <el-submenu index="2-4">
            <template slot="title">选项4</template>
            <el-menu-item index="2-4-1">选项4-1</el-menu-item>
          </el-submenu>
        </el-submenu>
        <el-submenu index="3">
          <template slot="title">
            <i class="el-icon-setting"></i>
            <span slot="title">导航三</span>
          </template>
          <el-menu-item-group>
            <template slot="title">分组一</template>
            <el-menu-item index="3-1">选项1</el-menu-item>
            <el-menu-item index="3-2">选项2</el-menu-item>
          </el-menu-item-group>
          <el-menu-item-group title="分组2">
            <el-menu-item index="3-3">选项3</el-menu-item>
          </el-menu-item-group>
          <el-submenu index="3-4">
            <template slot="title">选项4</template>
            <el-menu-item index="3-4-1">选项4-1</el-menu-item>
          </el-submenu>
        </el-submenu>
      </el-menu>
    </el-aside>

    <el-container>

      <el-header style="font-size: 12px; border-bottom: 1px solid #ccc; line-height: 60px; display: flex">
        <div style="flex: 1; font-size: 20px">
          <span :class="collapseBtnClass" style="cursor: pointer" @click="collapse"></span>
        </div>
        <el-dropdown style="width: 70px; cursor: pointer">
          <span>{{user.username}}</span><i class="el-icon-arrow-down" style="margin-left: 5px"></i>
          <el-dropdown-menu slot="dropdown">
            <el-dropdown-item>个人信息</el-dropdown-item>
            <el-dropdown-item>退出</el-dropdown-item>
          </el-dropdown-menu>
        </el-dropdown>

      </el-header>

      <el-main>
        <div style="margin-bottom: 30px">
          <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
          </el-breadcrumb>
        </div>

        <div style="margin: 10px 0">
          <el-input style="width: 200px" placeholder="请输入用户名"
                    v-model="username" suffix-icon="el-icon-search"></el-input>
          <el-input style="width: 200px" placeholder="请输入密码"
                    v-model="password" suffix-icon="el-icon-message" class="ml-5"></el-input>
          <el-button class="ml-5" type="primary" @click="search">搜索</el-button>
          <el-button class="ml-5" type="warning" @click="reset">重置</el-button>
        </div>

        <div style="margin: 10px 0">
          <el-button type="primary" @click="handleAdd" class="mr-5">新增 <i class="el-icon-circle-plus-outline"></i></el-button>
          <el-popconfirm
              confirm-button-text='确定'
              cancel-button-text='再想想'
              icon="el-icon-info"
              icon-color="red"
              title="确定批量删除吗？"
              @confirm="delBatch">
            <el-button type="danger" slot="reference" class="mr-5">批量删除 <i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
          <el-button type="primary">导入 <i class="el-icon-bottom"></i></el-button>
          <el-button type="primary">导出 <i class="el-icon-top"></i></el-button>
        </div>
        <el-table :data="tableData.slice(startIndex,startIndex+pageSize)" border stripe
                  @selection-change="handleSelectionChange">
          <el-table-column
              type="selection"
              width="55">
          </el-table-column>
          <el-table-column prop="aid" label="id" width="140">
          </el-table-column>
          <el-table-column prop="username" label="用户名" width="120">
          </el-table-column>
          <el-table-column prop="password" label="密码">
          </el-table-column>
          <el-table-column label="操作" width="500px" align="center">
            <template slot-scope="scope">
              <el-button type="success" @click="handleEdit(scope.row)" class="mr-5">
                编辑<i class="el-icon-edit"></i>
              </el-button>
              <el-popconfirm
                  confirm-button-text='确定'
                  cancel-button-text='再想想'
                  icon="el-icon-info"
                  icon-color="red"
                  title="确定删除吗？"
                  @confirm="del(scope.row.aid)">
                <el-button type="danger" slot="reference">删除 <i class="el-icon-remove-outline"></i></el-button>
              </el-popconfirm>
            </template>
          </el-table-column>
        </el-table>
        <div style="padding: 10px 0">
          <el-pagination
              @size-change="handleSizeChange"
              @current-change="handleCurrentChange"
              :page-sizes="[5, 10, 15, 20]"
              :page-size=pageSize
              layout="total, sizes, prev, pager, next, jumper"
              :total=total>
          </el-pagination>
        </div>
        <!--    管理员信息的弹窗    -->
        <el-dialog title="管理员信息" :visible.sync="dialogFormVisible" width="30%">
          <el-form :model="admin" :rules="rules" ref="admin">
            <el-form-item label="用户名" label-width="100px" prop="username">
              <el-input v-model="admin.username" autocomplete="off"></el-input>
            </el-form-item>
            <el-form-item label="密码" label-width="100px" prop="password">
              <el-input v-model="admin.password" autocomplete="off" type="password"></el-input>
            </el-form-item>

          </el-form>
          <div slot="footer" class="dialog-footer">
            <el-button @click="dialogFormVisible=false">取 消</el-button>
            <el-button type="primary" @click="saveAdmin('admin')">{{ btnText }}</el-button>
          </div>
        </el-dialog>
      </el-main>

    </el-container>
  </el-container>
</template>

<script>

import request from "@/utils/request";

export default {
  name: 'Home',
  data() {
    return {
      tableData: [],
      user:sessionStorage.getItem("user")?JSON.parse(sessionStorage.getItem("user")):{},
      collapseBtnClass: 'el-icon-s-fold',
      isCollapse: false,
      sideWidth: 200,
      startIndex: 0,
      username:"",
      password: "",
      pageSize: 5,
      total: 0,
      dialogFormVisible: false,
      btnText: "",
      admin: {},
      multipleSelection: [],
      rules: {
        username: [
          {required: true, message: '请输入用户名', trigger: 'blur'},
          {min: 3, message: '长度在 3 个字符以上', trigger: 'blur'}
        ],
        password: [
          {required: true, message: '请输入密码', trigger: 'blur'},
          {min: 6, message: '长度在 6 个字符以上', trigger: 'blur'}
        ]
      },
    }
  },
  created() {
    this.load()
  },
  methods: {
    collapse() {  // 点击收缩按钮触发      
      if (this.isCollapse) {  // 展开
        this.sideWidth = 200
        this.collapseBtnClass = 'el-icon-s-fold'
      } else {   // 折叠
        this.sideWidth = 64
        this.collapseBtnClass = 'el-icon-s-unfold'
      }
      //改变是否折叠的状态变量
      this.isCollapse = !this.isCollapse
    },
    load() {
      request.get("/admin/findall").then(res => {
        this.tableData = res
        this.total = this.tableData.length
        this.startIndex=0
      })
    },
    handleSizeChange(pageSize) {
      this.pageSize = pageSize
    },
    handleCurrentChange(pageNum) {
      this.startIndex = (pageNum - 1) * this.pageSize
    },
    handleAdd() {
      this.btnText = "添加"
      this.admin = {}
      this.dialogFormVisible = true
    },
    handleEdit(row) {
      this.btnText = "修改"
      this.dialogFormVisible = true
      this.admin = Object.assign({}, row)
      console.log(this.admin)
    },
    saveAdmin(admin) {
      this.$refs[admin].validate((valid) => {
        if (valid) {
          this.dialogFormVisible = false
          request.post("admin/save",this.admin).then(res=>{
            if (res){
              this.$message.success(this.btnText + "成功")
              this.load()
            }else {
              this.$message.error(this.btnText + "失败")
            }
          })
        } else {
          console.log('error submit!!');
          return false;
        }
      });
    },
    del(id) {
      request.post("admin/delete",id).then(res=>{
        if (res){
          this.$message.success( "删除成功")
          this.load()
        }else {
          this.$message.error( "删除失败")
        }
      })
      console.log(id)
    },
    handleSelectionChange(val) {
      // console.log(val)
      this.multipleSelection = val
    },
    delBatch() {
      //map函数：数组的每个元素都执行一个给定的函数，返回值仍为一个数组
      let ids = this.multipleSelection.map(v => v.aid)
      if(ids.length!==0){
        request.post("admin/deleltebatch",ids).then(res=>{
          if (res){
            this.$message.success( "批量删除成功")
            this.load()
          }else {
            this.$message.error( "批量删除失败")
          }
        })
      }else {
        this.$message.warning( "请选择要删除的数据")
      }
    },
    search(){
      request.get("/admin/selectbycondition",{
        params:{
          username:this.username,
          password:this.password,
        }
      }).then(res => {
        this.tableData = res
        this.total = this.tableData.length
        this.startIndex=0
      })
    },
    reset(){
      this.username=""
      this.password=""
      this.load()
    }
  }
}
</script>